Mortifying, yes; dangerous or smelly, no. This expulsion of air, if it occurs at all, tends to happen during sex or maybe (and equally as unfortunate) in yoga class. (For a very funny and oddly feminist take, check out this South Park episode.) "It's the perfect storm of air being compressed [and escaping] and definitely not indicative of an internal problem," says Elisa Ross, M.D., a physician at the Cleveland Clinic Institute of Obstetrics, Gynecology and Women's Health. "Chances are it won't happen again, so laugh and change your position slightly."